One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(9,10,13,15)(11,14,12,16)(18,23)(19,28)(20,29)(22,32)(24,31)(25,30)(1,3)(2,6)(4,7)(5,8)(9,11,13,12)(10,14,15,16)(17,18,21,23)(19,29,30,31)(20,28,24,25)(22,27,32,26)(1,2,5,4)(3,6,8,7)(9,12,13,11)(10,14,15,16)(17,19,22,28,21,30,32,25)(18,24,26,29,23,20,27,31)(1,4,5,2)(3,6,8,7)(17,20,21,24)(18,25,23,28)(19,27,30,26)(22,31,32,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.